use xdg.configFile for files in XDG config home

modules/misc/fontconfig.nix

@@ -29,7 +29,7 @@ in
   };
 
   config = mkIf cfg.enableProfileFonts {
-    home.file.".config/fontconfig/conf.d/10-nix-profile-fonts.conf".text = ''
+    xdg.configFile."fontconfig/conf.d/10-nix-profile-fonts.conf".text = ''
       <?xml version='1.0'?>
       <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
       <fontconfig>

modules/misc/gtk.nix

@@ -124,10 +124,10 @@ in
             mapAttrsToList formatGtk2Option ini
           ) + "\n" + cfg2.extraConfig;
 
-        home.file.".config/gtk-3.0/settings.ini".text =
+        xdg.configFile."gtk-3.0/settings.ini".text =
           toGtk3Ini { Settings = ini // cfg3.extraConfig; };
 
-        home.file.".config/gtk-3.0/gtk.css".text = cfg3.extraCss;
+        xdg.configFile."gtk-3.0/gtk.css".text = cfg3.extraCss;
       }
     );
 }

modules/programs/beets.nix

@@ -27,7 +27,7 @@ in
   config = mkIf (cfg.settings != {}) {
     home.packages = [ pkgs.beets ];
 
-    home.file.".config/beets/config.yaml".text =
+    xdg.configFile."beets/config.yaml".text =
         builtins.toJSON config.programs.beets.settings;
   };
 }

modules/programs/feh.nix

@@ -30,7 +30,7 @@ in
   config = mkIf cfg.enable {
     home.packages = [ pkgs.feh ];
 
-    home.file.".config/feh/keys".text = ''
+    xdg.configFile."feh/keys".text = ''
       # Disable default keybindings
       ${concatStringsSep "\n" (mapAttrsToList disableBinding cfg.keybindings)}
 

modules/programs/htop.nix

@@ -290,7 +290,7 @@ in
   config = mkIf cfg.enable {
     home.packages = [ pkgs.htop ];
 
-    home.file.".config/htop/htoprc".text = let
+    xdg.configFile."htop/htoprc".text = let
       leftMeters = map (m: m.kind) cfg.meters.left;
       leftModes = map (m: m.mode) cfg.meters.left;
       rightMeters = map (m: m.kind) cfg.meters.right;

modules/programs/termite.nix

@@ -310,7 +310,7 @@ in
       optionalString = name: val: lib.optionalString (val != null) "${name} = ${val}";
     in mkIf cfg.enable {
       home.packages = [ pkgs.termite ];
-      home.file.".config/termite/config".text = ''
+      xdg.configFile."termite/config".text = ''
         [options]
         ${optionalBoolean "allow_bold" cfg.allowBold}
         ${optionalBoolean "audible_bell" cfg.audibleBell}

modules/services/dunst.nix

@@ -71,7 +71,7 @@ in
       }
 
       (mkIf (cfg.settings != {}) {
-        home.file.".config/dunst/dunstrc".text = toDunstIni cfg.settings;
+        xdg.configFile."dunst/dunstrc".text = toDunstIni cfg.settings;
       })
     ]
   );

modules/services/polybar.nix

@@ -111,7 +111,7 @@ in
 
   config = mkIf cfg.enable {
     home.packages = [ cfg.package ];
-    home.file.".config/polybar/config".source = configFile;
+    xdg.configFile."polybar/config".source = configFile;
 
     systemd.user.services.polybar = {
       Unit = {

modules/systemd.nix

@@ -28,12 +28,12 @@ let
 
       wantedBy = target:
         {
-          name = ".config/systemd/user/${target}.wants/${name}.${style}";
+          name = "systemd/user/${target}.wants/${name}.${style}";
           value = { inherit source; };
         };
     in
       singleton {
-        name = ".config/systemd/user/${name}.${style}";
+        name = "systemd/user/${name}.${style}";
         value = { inherit source; };
       }
       ++
@@ -107,7 +107,7 @@ in
     # If we run under a Linux system we assume that systemd is
     # available, in particular we assume that systemctl is in PATH.
     (mkIf pkgs.stdenv.isLinux {
-      home.file =
+      xdg.configFile =
         listToAttrs (
           (buildServices "service" cfg.services)
           ++